Moistening device for motor-driven duplicating machines



Dec. 23, 1952 H. P. KElL 2,622,519

MOISTENING DEVICE FOR MOTOR-DRIVEN DUPLICATING MACHINES Filed Dec. 15,1947 8 Sheet s-Sheet l T a T w:- JNVENTOR.

Henry I? Kei'l BY Figs L Dec. 23, 1952 H. P. KElL 2,622,519

MO ISTENIN.G DEVICE! FOR MOTOR-DRIVEN DUPLICATING MACHINES Filed Dec.15, 1947 v s Sheets-Sheet 2 F igQZ.

n INVEN TOR.

- Henry F Kei/ BY AI/omey 7W. m m A INVENTOR Henry I? Kei/ H P KElL.2,622,519

MOISTENING DEVICE FOR MOTOR-DRIVEN DUPLICATING MACHINES 8 Sheets-Sheet 5vm mm mm@ mm NE mm NQ Fi-led Dec.

7 Dec. 23, 1952 Qmw Mm vm wk IN VEN TOR hwnny P K? MW Attorney 8Sheets-Sheet 4 F! P EIL MOISTENING DEVICE FOR MOTOR-DRIVEN DUPLICATINGMACHINES Dec. 23, 1952 Filed Dec.

Dec. 23, 1952 H. P. KElL 2,622,519

MOISTENING DEVICE FOR MOTOR-DRIVEN DUPLICATING MACHINES Filed Dec. 15,1947 8 SheetsSheet 5 INVENTO Henry I? Kei/ BY A Home y Dec. 23, 1952 H.P. KEIL 2,522,519

MOISTENING DEVICE FOR MOTOR-DRIVEN DUPLICATING MACHINES Attorney H. P.KElL 2,622,519

DRIVEN DUPLICATING MACHINES Dec. 23, 1952 MOISTENING DEVICE FOR MOTOR- 8Sheets-Sheet 7 Filed Dec. 15, 1947 INVENTOR.

Henry BY E Mail Attorney H. P. KElL Dec. 23, 1952 MOISTENING DEVICE FORMOTOR-DRIVEN DUPLICATING MACHINES 8 Sheets-Sheet 8 Filed Dec. 15, 1947Fig. 9.

Fig. /0.

Henry I? Kei/ A Home y Patented Dec. 23, 1952 MOISTENING DEVICE FORMOTOR-DRIVEN DUPLICATING MACHINES Henry P. Kcil, Chicago, Ill., assignorto The Fixture Hardware Corporation, Chicago, 111., a corporation ofIllinois Application December 15, 1947, Serial No. 791,881

9 Claims.

My invention relates to improvements in duplicating machines and isparticularly directed to a novel arrangement whereby, the machine may bepower driven from a motor or like source of power, and controlled with asingle simple lever control.

It is a purpose of my invention to provide a machine of this characterwith a novel arrangement of parts whereby the connection of power to thedrum to rotate it is accomplished simultaneously with the bringing ofthe feeding and moistening rollers into operative relation to eachother.

, It is also a purpose of my invention to provide a novel tensioningmeans for insuring adequate pressure upon a sheet being moistened andfed to the drum, regardless of whether the sheet is a thin one or one ofthick card stock,

My invention contemplates also the provision of a novel arrangement ofmoistening fountain and moistening rollers that is particularlyadvantageous in maintaining the rollers clean and in providing for readyreplacement of one roller with another which is desirable in the rollercombination employed for obtaining a variation in the amount of moistureapplied to a copy sheet to thereby make more or less bright copies.

My invention contemplates also the provision of a novel drive means forthe drum of a duplicating machine which drive means is free of anyclutch mechanism, other than the operative parts of the duplicatingmechanism, for connecting the drum to a source of power, the drive meansbeing so arranged that the motor may run continuously and be connectedto the drum, and the duplicating mechanism made operative, at the willof the operator.

A further object of my invention is to provide a novel roller mountingfor the moistening roller assembly in a duplicating machine.

It is also an object of my invention to provide a new feed tray andsheet guide for duplicating machines wherein the side guides may bemoved to various positions and held there without the troublesomesprings beneath the tray, heretofore employed, the feed tray havingmeans to protect the tray and sheet feeding rollers from the wearingaction of the sheet feeding mechanism when the copy sheets have all beenremoved from the tray and the sheet feeding mechanism is allowed tocontinue to operate.

The nature and advantages of my invention will appear more fully fromthe following description and the accompanying drawings wherein apreferred form of my invention is shown.

2 It should be understood, however, that the description and drawingsare illustrative only and should not be considered as limiting theinvention except insofar as it is limited by the claims.

In the drawings:

Figure 1 is a plan view of a duplicating machine embodying my invention;

Figure 2 is a sectional view taken on the line 22 of Figure 1;

Figure 3 is an enlarged fragmentary sectional view taken on the line 22of Figure 1, but showing the parts in a different position from thatshown in Figure 2';

Figure 4 is a sectional view taken on the line 4-4 of Figure 1;

Figure 5 is a sectional view taken on the line 55 of Figure 2;

Figure 6 is a sectional view taken on the line B-6 of Figure 1;

Figure 7 is a fragmentary sectional view taken on the line 7-! of Figure6;

Figure 8 is a sectional view on the line 88 of Figure 6;

Figure 9 is a plan view of a portion of the feed tray of the machine;

Figure 10 is a sectional view on the line lill0 of Figure 9;

Figure 11 is a fragmentary sectional View on the line ll-ll of Figure10;

Figure 12 is an enlarged fragmentary sectional view taken on the linel2l2 of Figure 2; and

Figure 13 is a fragmentary sectional view taken on the line 13-43 ofFigure 3.

Referring now to the drawings, the machine as shown has opposite sideframes Ill and II which are connected at their opposite ends by crossbars [2 and I3. Each side frame is cast, preferably of a light metalsuch as an aluminum alloy, and has laterally extending bracket portions14 and [5 to which the cross bars I2 and [3 are bolted. Rubber feet [6are also bolted to the bracket portions by th same screw-bolts ll thatsecure the cross bars. There are also two cross tie rods l8 and MB,connecting the side frames. (See Figure 5.) The tie rod 29 supports theends of two side plates 2| and 22 which are part of a motor and drivemechanism subframe. The side plates are further supported by two studs23 and 24 that are threaded into bosses 25 and 26 near the front ends ofthe side frames ID and H. 1

The duplicating drum 2! on which master sheets are carried is mounted ona shaft 28 that is rotatably supported in suitable bearings (not shownin the side frames I8 and II). The shaft 28 projects beyond the framesI8 and II as indicated in Figure 1 where one end of the shaft 28 isshown with a paper feed operating crank 29 thereon, and the other end ofthe shaft is shown with a hand wheel 38 thereon by which the drum can beturned by hand. The receiving tray 3I is supported beneath the drum toreceive copy sheets after they have contacted the master sheet on thedrum. The copy sheets are pressed against the master sheet on the drumby a pressure roller 32. The pressure roller 32 is the driving memberfor rotating the drum 2? and rotation of the drum is efiected by drivingthe pressure roller by a suitable motor and drive mechanism.

The motor is shown at 33 and is supported between the side plates 2I and22 by supporting blocks 34 and 35, the top portions of which areremovable to permit the motor to be removed. The motor has a worm shaft36 which meshes with a worm gear 3! that is fixed on a shaft 38. One endof the shaft 38 is journalled in a bearing 39 in the side plate 2I andthe other end is journalled in a boss 40 on the side frame II. A bearing4| is provided in the side plate 22 for the shaft. The worm shaft andgear are lubricated continuously by a grease retainer 42 which bearsagainst the under face of the worm shaft 36. Grease is fed into theretainer 42 from a grease cup 53. The free end of the worm shaft 36 isjournalled in a bearing block 44, the upper end of which is mounted onthe tie rod 20 and the lower end of which is mounted on a rod 45 that issecured in the side plates 2| and 22. The rod 46 also serves to mount ayoke 46 which secures the retainer 42 and the grease cup 43. The greasecup is connected to the retainer by an elbow ll and a pipe 48.

The mechanism by which motion is transmitted from the shaft 38 (drivenby the motor 33 through the worm 36 and gear 37) to the pressure roller32 is shown best in Figures 3 and 5. A sprocket wheel 49 is secured onthe shaft 38. A sprocket chain 58 connects the sprocket wheel 49 with asprocket wheel which is integrally joined with a gear 52 of largerdiameter. The sprocket wheel SI and the gear 62 are journalled on a stubshaft 53 which also pivotally mounts a rocker arm 54 that carries oneend of the pressure roller 32. The stub shaft 53 is mounted in a boss 55formed on the side frame II. A similar boss 56 on the side frame I0 hasa stub shaft 51 secured in it and the stub shaft E'Isupports a secondrocker arm 58 which supports the other end of the pressure roller 32. Aspring retainer 59 holds the pressure roller shaft 32s in a seat in thearm 58. The other end of the shaft 323 has a pinion 60 thereon whichmeshes with the gear 52.

The rocker arms 54 and 58 have depending portions 54a and 58;; (Figures3 and 4) which have adjustable stops 54b and 58b thereon. These stopsare positioned to be engaged by rollers 6| and 62 that are secured inthe ends of arms 63 and 64 which are fastened on a, rock shaft 65. Therock shaft 65 is rotatably mounted in bosses 66 and 67 on the sideframes I6 and I I. When the arms 63 and 64 are moved from the positionsillustrated in Figures 2 and 4 to the position indicated in Figure 3they move the rocker arms 54 and 58 in a direction to bring the pressureroller 32 against the drum 2.1.

The mechanism by which the rocker arms 64 nd 58 are moved to bring thepressure roller into and out of drum engaging position is illustratedbest in Figures 2 to 5 inclusive and in Figure 13. This mechanismincludes a hand lever 68 pivoted on the cross tie rod I8. The hand lever68 has an arm 69 which is connected by a link 78 and a pin 'II to aplate I2 that is rigidly connected with the arm 63 nd the shaft 65. Apin 73 is also pivoted by the pin '1 I to the link I6 and plate "i2.This pin "i3 extends through a bracket I4 that is mounted on the bracketportion I4 by the screw bolt IT. The pin '13 has a coiled spring 15thereon between the bracket 14 and the plate 72. The spring is undercompression so that it tends to oppose movement of the assemblycomprising the arm 63, the plate 72, the pin I I, and the link 70 fromeither the position shown in Figure 2 or that shown in Figure 3 to theother position.

The hand lever also serves to control the mechanism for opening and.closing the master sheet gripping means of the drum. As best shown byFigures 2, 3 and 4, a gripping bar I6 is mounted in a slot IT in thedrum surface. The bar is pivoted at its ends by arms l8 and 19 to thedrum ends so that it may rock from one side of the slot ll to the other.Springs 86 and HI are mounted on the drum ends by housings 82 and 83 andpress the arms in one (master sheet gripping) direction. In order toopen the gripping bar, it is necessary to press it against the force ofthe springs 66 and ill. This is done by turning a nattened cam shaft 64(Figure 4) that is journalled in the drum and bears against the arms i6and I9. The cam shaft 84 has an arm 86 fixed thereon and extendingtoward the drum shaft 23. This arm has a pin 86 in its free end. The pin66 is engaged, when it is desired to open the master sheet grippingmeans, by a stop shoulder ill and a roller 66 on a lever arm 88. Thelever arm is pivoted to the side frame II by a pivot pin 66. A link 9Iconnects the plate I2 with the lever arm 88, so that, when the handlever 66 is moved to its upper position as shown in Figures 2 and 4, thelever 88 is pulled down to position to open the gripper bar as the drumis turned clockwise by hand.

The advance of the drum is also stopped at this time by theinterposition of a lever 92, which is pivoted on the lever 83, in thepath of a stop pin 93 on the drum. The lever 92 has a shoulder 94thereon for engaging the stop pin. The lever 92 is actuated by a spring95 connecting it with the lever arm 69. A pin 96 on the lever 92 rideson the link 9| to hold the lever 92 out of the path of the pin 93 whenthe parts are in running position as shown in Figure 3.

The arms 54 and 58 also support a lower copy sheet feeding roller 9?.This roller cooperates with an upper copy sheet feeding and moisteningroller 68 and its cooperating liquid feeding rollers 69 and IE6. Thedriving means for the feeding and moistening rollers 97 and 98 is shownbest by Figures 4 to 8 inclusive. This means comprises a cam Iilladjustably fixed on the drum 2'! which has a boss I62 formed on the drumend and jaws I63 and I64 on the cam clamped together on the boss I02 bya screw bolt I65. The cam IIlI strikes a resilient rubber ring I66. Thisring is mounted on a hub IEI'I which also has a sprocket wheel I68formed thereon. A chain I89 connects the sprocket wheel I06 with asprocket wheel I I8 which is fixed on the shaft of the roller 97. Thestub shaft 5'! supports the hub I97 in addition to its support of thearm 58.

By virtue of a novel arrangement the proper pressure is maintainedbetween the rollers 91 nd 98 regardless of the weights or thicknesses ofmaster sheets and copy sheets that may be used. It will be appreciatedthat thicker copy sheets, when engaged between the drum 2'! and thepressure roller 32, will tend to depress the roller 91. The pressurebetween the rollers 91 and 98 must be substantially independent of thiseffect. The novel relation of parts will now be described in connectionwith the mounting of the moistening means including the rollers 98, 99and I60.

The cross tie rod supports two end pieces III and H2 that are providedto support a liquid carrying trough II3. The lower ends of the piecesIII and H2 are split as indicated at lid and clamped on the rod 29 bybolts HE. A pin H6 is secured in the end piece II I and a pin III issecured in the end piece H2, both pins being threaded into theirrespective end pieces near the lower ends thereof. A spring H8 isanchored to the pin H6 and a spring H9 is anchored to the pin III.

At their upper ends the end pieces I I I and I I2 are recessed as shownat I26 and I2I to receive roller mounting brackets I22 and I23. A pinI22 is pressed into the end piece III and pivots the bracket I22. A pinI25 is threaded into the end piece H2 and pivots the bracket I25. Aknurled head I26 is provided on the pin I25 so it can be removed whenthe rollers are to be taken out of the machine. The brackets I22 and I23extend toward the drum 2'! and beyond the front lip I27 of the troughH3, then downward to provide end supports in which the shaft of theroller 96 is mounted. As seen best in Figures '7 and 8, the brackets I22and I23 may rock upward from a position where they rest upon the lip I27when the roller 9'1 moves upward against the roller 98.

The roller 99 is supported on the rollers 66 and I60. It has tworemovable brackets I29 and I29 at its ends. These brackets have centerapertures I36 to receive the shaft of the roller 99. They have pins I3Iat their lower ends to attach the springs II8 and H9 to them. AperturesI32 are provided in the upper ends of the brackets I28 and I29 so theymay be lifted with a hookshaped wire lifter I33 (see Figure 6) when theyare being placed on the shaft of the roller 99. The rollers are coveredby a sheet metal cover I34 which is fastened to ears I55 (see Figure 4)on the side frames I6 and II by cap screws I36.

A spirit level I31 is mounted on the cover I32 by a screw I38. The coverI34 is removed in Figure 1.

This construction is quite convenient for cleaning. When the trough II3needs cleaning to remove paper lint or when the rollers need cleaning,the rollers can be readily removed after removal of the cover, bylifting oif the brackets I28 and I29 and loosening the pin I25. Whenthis is done, all three rollers can be lifted out. Also in thismoistening mechanism the middle roller 99 is porous. If more moisture isneeded to make brighter copies, the brackets I28 and I29 are removed anda more porous roller is substituted for the less porous one. In allcases the pressure between the rollers is essentially the same since itis due in part to the weight of the rollers, a fixed amount, and in partto the pull of the springs H3 and II9 which pull varies very littlewithin the range of movement of the rollers 97 and 98 while they areengaged. When the machine is not in operation there is no pressurebetween the rollers 91 and 98. I

Liquid is supplied to the trough I I3 in a known manner from a container(inverted bottle) I39 and a tube I 46. A drain outlet is provided at I4Iunder control of a valve I42. This means of supplying liquid may besupplanted by other means within the scope of my invention.

Referring now to Figures 1, 2, 5, and 9 to 12 inelusive, the copy sheetholding and feeding mechanism will be described. The crank 29 on thedrum shaft 28 operates a link I44 that has its other end pivoted at I45to a sheet feeder actuating arm I46. The arm I46 is fixed on a rockshaft I41 that is mounted in the side frame I9 and the side piece 2|.The arm I46 extends upwardly and laterally over a copy sheet holdingtray I48. A second arm I49 is pivoted on the free end of the arm I46 andextends toward the drum. At its front end the arm I49 has a head I56 inwhich a shaft I5I is loosely mounted. The shaft mounts two hubs I52 andI53 for corrugated rubber rings I54 and I55. Guards I56 and I5! haveribs I58 thereon to check rotation of the rings I54 and I55 when the armI49 is moving in a direction to press them against the ribs I58, thatis, toward the drum.

The tray M8 has a center strip Idfia raised directly beneath the headI50 so that when the copy sheets have all been fed from the tray thisstrip I48a will hold the head high enough to prevent the rings I54 andI55 from riding on the tray surface. In this way excessive wear on thefeeding rings I54 and I55 and on the tray beneath them is prevented.

The tray I43 has side guides I59 and I69 which are adjustable toward andaway from each other and also lengthwise of the tray. The tray has crossslots I6I, I62, I63 and I64. The side guides have their horizontalportions provided with slots I65 and I66 running lengthwise from theirends toward the centers thereof. Large headed pins I61 extend throughthe slots and have large washers I63 and 169 between the guides and thetray and beneath the tray. Also intermediate the ends of the guides Iprovide means to lock the guides at any place they are adjusted to. Thismeans comprises plates Ill] welded to the side guides and extendingoutwardly therefrom. Over each plate I mount a cam lever IlI with a camend I'l'2 which, when the lever is upright, presses the plate I19 downinto tight engagement with the tray to prevent shifting of the sideguide. The side guides are also provided with adjustable grippers I15,similar to those shown in my application, Serial Number 726,502, forgripping the side edges of a stack of copy sheets placed between theguides I59 and I66.

The rocking of the lever arm I46 also actuates a counting device I ofany suitable type in the following manner. The shaft I41 carries an armI'IB which is fixed thereon. This arm is connected by a link ill to alike arm II8 fixed on a shaft I19 that is journalled in the side pieces2i and 22. Near the side frame II the counter I15 is mounted. It has anoperating arm I89 which is coupled by a link HII to an arm I82 that isfixed on the shaft I79. A reset handle I83 is shown for the counter.

Control of the motor 33 is by means of a switch I84 that is mounted onthe side frame II. However, except for cutting OK the motor when themachine is to be left idle for some time, the control is capable ofbeing entirely handled by the lever 68. The drum is rotated and thesheet feeding and moistening devices are operated only when the lever 63is moved into position to bring the pressure roller 32 into contact withthe drum. When a master sheet is to be replaced, the drum is turnedbackward from its stopping point until '7 the levers '88 and -92 performtheir functions of 'opening the gripper and locking the drumagainstfurther movement. It is then necessary to actuate the lever 68 to againapply power to the drum. In so doing the locks for the drumare released.

Having thus described my invention, I claim:

1. In a duplicating apparatus of the character described, a drum, apressure roller for pressing sheets against the drum, lever armssupporting the pressure roller and pivoted to swing it toward and awayfrom the drum, a copy sheet feeding roller carried by said lever'armsand spaced toward the free ends of said arms from the pressure roller, acopy sheet feeding and moistening roller cooperating with the copy sheetfeeding roller to advance sheets, brackets carrying the moisteningroller, a liquid trough, a roller therein, coaxial pivot members in thetrough for the brackets and the last named roller, a transfer rollerresting on the two last named rollers, bearing brackets hung on the endsof the transfer roller, and springs attached to the bearing brackets andpulling the transfer roller toward the other rollers,

2. In a duplicating apparatus of the character described, a drum, apressure roller for pressing sheets against the drum, lever armssupporting the pressure roller and pivoted to swing it toward and awayfrom the drum, a copy sheet feeding roller carried by said leverarms-and spaced toward the free ends of said arms from the pressureroller, a copy sheet feeding and moistening roller cooperating with 'thecopy sheet feeding roller to advance sheets, brackets carrying themoistened roller, 3, liquid trough, a roller therein, coaxial pivotmembers in the trough for the brackets and the last named roller, atransfer roller resting on the two last named rollers, bearing bracketsremovably hung on the ends of the transfer roller, and springs attachedto the bearing brackets and pulling the transfer roller toward the otherrollers.

3. In a duplicating apparatus of the character described, a drum, apressure roller for pressing sheets against the drum, lever armssupporting the pressure roller and pivoted to swing it toward and awayfrom the drum, a copy sheet feeding roller carried by said lever armsand spaced toward the free ends of said arms from the pressure roller, acopy sheet feeding and moistening roller cooperating with the copy sheetfeeding roller to advance sheets, brackets carrying the moisteningroller, a liquid trough, a roller therein, coaxial pivot members in thetrough for the brackets and the last named roller, one of said pivotmembers being retractable to release the roller, a transfer rollerresting on the two last named rollers, bearing brackets removably hungon the ends of the transfer roller, and springs attached to the bearingbrackets and pulling the transfer roller toward the other rollers.

l. In a duplicating apparatus of the character described, thecombination with a master sheet holding drum, of a pressure rollercooperating therewith to press copy sheets against a master sheet on thedrum, copy sheet feedingand moistening means driven by the drum to.advance moistened copy sheets to the drum and pressure roller, powerdriven means operably connected to the pressure roller to rotateit,.said.drum being driven only by engagement with .the pressure rollermounting means for the pressure roller movably mountin it for engagementand separation from the drum, whereby to drive .andrelease the drum,means to stop rotational advance of the drum when it is released fromthepressure roller, and a hand lever operable to move the pressure rollerintoand out of engagement with the drum while the pressure roller isbeingrotated.

5. In a duplicating apparatus of the character described, thecombination with a, master sheet holding drum, having a releasablegripper for attaching one edge of a master sheet thereto, of a pressureroller cooperating therewith to press copy sheets against a master sheeton the drum, copy sheet feeding and moistening means driven by the drumto advance moistened copy sheets to the drum and pressure roller, powerdriven means operably connected to the pressure roller to rotate it,said drum being driven only by engagement with the pressure rollermounting means for the pressure roller movably mounting it forengagement and separation from the drum, whereby to drive and releasethe drum, means to stop rotational advance of the drum when it isreleased from the pressure roller, and a hand lever operable to move thepressure roller into and out of engagement with the drum while thepressure roller is being rotated.

6. In a duplicating apparatus of the character described, thecombination with a master sheet holding drum, having a releasablegripper for attaching one edge of a master sheet thereto, of a pressureroller cooperating therewith to press copy sheets against a master sheeton the drum, copy sheet feeding and moistening means driven by the drum,power driven means operably connected to the pressure roller to rotateit, said drum being driven only by engagement with the pressure rollermounting means'for the pressure roller movably mounting it forengagement and separation from the drum, whereby to drive and releasethe drum, means to stop rotational advance of the drum when it isreleased from the pressure roller, a'hand lever operable to move thepressure roller into and out of engagement with the drum while thepressure roller is being rotated, and means connected to the hand leverand movable thereby to engage and render the stop means ineffectiveuponmovement of the hand lever into position to engage the pressureroller with the drum.

7. In a duplicating machine, a supporting frame, a drum mounted in theframe having means thereon to mount a master sheet, a pressure rollermounted in the frame for pressing copy sheets against the drum, a liquidtrough mounted on the frame adjacent to the drum, a roller therein, amoistening roller between the trough and the drum, brackets pivoted to:the ends of the trough and supporting the moistening roller, a transferroller resting on the two last named rollers, spring means and bearingsat the ends of said transfer roller for pressing the transferrollerdownwardly, a .copy .sheet feeding roller beneath the moistening rollersupporting arms carrying said copy sheet feeding roller and pivoted inthe frame, and a hand lever operably connected to the arms to move thefeed roller from a lower inoperative position separated from themoistening roller upwardly against the moistenin roller and to lift themoistening roller and the transfer roller against the force of saidspring means.

8. In a duplicating machine, a supporting frame, a drum mounted in theframe having means thereon to mount a master sheet, a pressure rollermounted in the frame for pressing copy sheetsagainst the-drum, aliquidtrough mounted on the frame adjacent to the drum, a rollertherein, a moistening roller between the trough and the drum, bracketscarrying said moistening roller and extending over the adjacent side ofthe trough and having portions in the trough, the roller in the troughbeing pivotally mounted on the bracket portions in the trough, pivotmembers in the ends of the trough pivotally supporting the brackets, atransfer roller resting on the two last named rollers, spring means andbearings at the ends of said transfer roller for pressing the transferroller downward, a copy sheet feeding roller beneath the moisteningroller, and means to raise and lower the copy sheet feeding roller intoand out of pressure engagement with the moistening roller.

9. In a duplicating apparatus of the character described, a drum, apressure roller for pressing sheets against the drum, lever armssupporting the pressure roller and pivoted to swing it to- Ward and awayfrom the drum, a copy sheet feeding roller carried by said lever armsand spaced toward the free ends of said arms from the pressure roller, acopy sheet feeding and moistening roller cooperating with the copy sheetfeeding roller to advance sheets, brackets carrying the moisteningroller, a liquid trough, a roller therein, the bracket members extendinginto the trough, means on the brackets pivotally supporting the rollerin the trough, a transfer roller resting on the two last named rollers,spring means pulling the transfer roller down against the said lastnamed rollers and pressing the brackets against the trough edge, the

10 copy sheet feeding roller being beneath the moistening roller, andmanually operable means to raise the lever arms thereby to lift thefeeding and moistening rollers against the force of said spring means.

HENRY P. KEIL.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,788,782 Thatcher Jan. 13, 19311,828,298 Shaver Jr. Oct. 20, 1931 1,957,483 Wolfson May 8, 19341,964,498 Brasseur June 26, 1934 2,072,534 Terry Mar. 2, 1937 2,112,341Klemm Mar. 29, 1938 2,126,514 Storck et a1. Aug. 9, 1938 2,165,535Brownsey July 10, 1939 2,185,682 Pittman Jan. 2, 1940 2,220,282Ritzerfeld Nov. 5, 1940 2,231,639 Ritzerfeld Feb. 11, 1941 2,271,954Rockhill Feb. 3, 1942 2,349,634 Neal May 23, 1944 2,351,863 LavanhagenJune 20, 1944 2,364,942 Bradt Dec. 12, 1944 2,573,810 Rundblad Nov. 6,1951 FOREIGN PATENTS Number Country Date 580,577 Great Britain Sept. 12,1946

